CN2569168Y - Improved optical fibre collimator - Google Patents
Improved optical fibre collimator Download PDFInfo
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- CN2569168Y CN2569168Y CN 02252544 CN02252544U CN2569168Y CN 2569168 Y CN2569168 Y CN 2569168Y CN 02252544 CN02252544 CN 02252544 CN 02252544 U CN02252544 U CN 02252544U CN 2569168 Y CN2569168 Y CN 2569168Y
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- optical fiber
- outer tube
- spherical lens
- fiber collimator
- lens
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- 239000011521 glass Substances 0.000 claims description 13
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- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
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- 239000003292 glue Substances 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 abstract description 33
- 238000003780 insertion Methods 0.000 abstract description 11
- 230000037431 insertion Effects 0.000 abstract description 11
- 239000000835 fiber Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
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Abstract
The utility model relates to an improved optical fiber collimator, which is mainly composed of an outer sleeve pipe, a lens and an optical fiber head. The improved optical fiber collimator is characterized in that the lens is an aspheric lens; the external diameter of the aspheric lens is the same with the internal diameter of the outer sleeve pipe; the aspheric lens is sheathed in the outer sleeve pipe form a first end of the outer sleeve pipe to fix; the aspheric lens and the optical fiber head are arranged in the outer sleeve pipe; the external diameter of the optical fiber head is the same with the internal diameter of the outer sleeve pipe; the optical fiber head is sheathed in the outer sleeve pipe from a second end of the outer sleeve pipe, and makes real-time optical adjustment and calibration program corresponding to the aspheric lens and then is fixed. The distance of the fixed position of the optical fiber head and the aspheric lens is adjusted to be equal to or greater than the effective focusing length of the aspheric lens; the distance away from a focus delta d of the end point of the optical fiber is controlled within delta d greater than or equal to 0 and less than or equal to 30 MUM; the optimal working distance changes along with the size of each distance away from the focus delta d and comprises various specifications of 0MM to 140MM; the insertion loss is kept under 0.15DB to upgrade optical performance. The utility model can be applied on components with long working distance to increase range of application.
Description
Technical field
The utility model relates to a kind of optical fiber collimator, particularly a kind ofly promotes optical property and is applied in improved optical fiber collimator on the long reach assembly.
Background technology
In the optical communication assembly, behind the normal beam expander and parallelization that needs to be transmitted in the optical fiber, through some functional modules, again with continuation transmission in focusing of parallelization light beam and the coupled back into optical fibers.The part of playing the part of this role is exactly optical fiber collimator (Fiber Collimator); And the optical fiber collimator system comprises two paired optical fiber collimators, an one optical fiber collimator can will have the outgoing beam at certain angle (NA) of loosing, after the collimation eyeglass is with parallel beamization, through after the operating distance of system, by another optical fiber collimator light beam is focused on and coupled back into optical fibers in, and be in this operating distance for placing various functors; And the best effort distance range of an optical fiber collimator system to be two parallel beams between the optical fiber collimator can keep the depth of parallelism, and the distance between two optical fiber collimators during the minimum insertion loss (Insertion Loss) that keeps system.
The structure or the manufacturing technology of known again optical fiber collimator (Fiber Collimator), as shown in Figure 1, this optical fiber collimator 10 is to utilize a glass bushing (Glass Tube) 11 with level and smooth internal diameter, external diameter (Outer Diameter of sleeve pipe 11 internal fixation, O.D.) with casing inner diameter (Inner Diameter, I.D.) identical optical fiber head 12 (or claiming contact pin), in order to positioning optical waveguides 13, and graded index (graded-index, GRIN) eyeglass (or claiming GRIN-type lens) 14, in order to return in another optical fiber with optical fiber 13 parallel beamizations or with the parallelization light beam coupling, outside glass bushing 11, coat a stainless steel sleeve pipe 15 again, as follow-up welding engineering usefulness, comprise laser bonding (Laser Welding) and scolding tin welding (Soldering) etc.And when the assembling optical fiber collimating apparatus, for the insertion loss (Insertion Loss) that reduces collimating apparatus, usually the relative position that needs real-time adjustment optical fiber head 12 and graded index eyeglass 14, and make output beam in the scope of operating distance (Working Distance), reach best parallel beam, i.e. minimum scatter angle (Beam Divergence) and minimum deviation angle.But, above-mentioned have a graded index (graded-index, GRIN) optical fiber collimator 10 of eyeglass 14 or its manufacture method, comprise: Announcement Number on July 11st, 2002 No. 494250 " optical fiber collimator and manufacture method thereof " creation patent (application case number 090128544), announce US6 January 2 calendar year 2001,168,319B1 " SYSTEM AND METHOD FOR ALIGNING OPTICAL FIBERCOLLIMATORS " creation patent etc. have following shortcoming in processing procedure and use:
(1), (graded-index, GRIN) the degree of difficulty height of the manufacturing technology of eyeglass itself can't simple and easy moulding, and cost of manufacture is improved relatively for this cylindrical graded index.
(2), the length of each GRIN eyeglass is once selected, the operating distance of made optical fiber collimator system is also for fixing, therefore, equal visual function spare needs and elder generation's decision operating distance in the manufacturing, and the length of decision GRIN eyeglass, causing required GRIN eyeglass has all lengths specification, relatively increases to produce trouble.
(3), for functor than long reach, the GRIN-type optical fiber collimator can't keep inserting loss (Insertion Loss) below 0.15dB, causing optical property reduces, be not suitable for long reach as reaching more than the 100mm to the assembly of 140mm, on light circulator (OpticalCirculator), light interleaver (Optical Interleaver), optical exchanger multi-channel optical assemblies (Multi-port Optical Device) such as (Optical Switch), and using character can't conform with the institute ask.So for overcoming above-mentioned shortcoming, this creator has the utility model to produce through the further investigation exploitation eventually.
Summary of the invention
The utility model is that a kind of improved optical fiber collimator will be provided, and has solved to make it promote optical property and be applied in the technical matters that increases range of application on the assembly of long reach.
It is such solving the problems of the technologies described above the technical scheme that is adopted:
A kind of improved optical fiber collimator is made of an outer tube, an eyeglass and an optical fiber head, it is characterized in that:
This eyeglass is a non-spherical lens, and its external diameter is identical with the internal diameter of outer tube, and is inserted in the outer tube internal fixation from first end of outer tube;
This outer tube is installed with a non-spherical lens and an optical fiber head in its pipe;
This optical fiber head, its external diameter is identical with the internal diameter of outer tube, second end from outer tube is inserted in the outer tube, and to should non-spherical lens and make real-time optics adjustment program and fixed, and the spacing of the fixed position of optical fiber head and non-spherical lens be to be adjusted into the effective focusing length that is equal to or greater than this non-spherical lens;
And by above-mentioned structure, the out of focus distance of optical fiber end points is controlled in the certain limit, make the best effort that sets the optical fiber collimator of finishing apart from containing all size of lid in a big way with the size variation of out of focus distance, and can promote optical property, and can be applicable on the assembly of long reach and increase range of application;
The fixed position of this optical fiber head and the spacing of non-spherical lens than the effective focusing length of this non-spherical lens greater than part be the best to be no more than 30 μ m;
The out of focus distance, delta d of this optical fiber end points is in the scope of 30 μ m 〉=Δ d 〉=0;
This optical fiber collimator best effort distance is in 0mm～140mm scope, and keeps inserting loss below 0.15dB;
This non-spherical lens is the model aspheric surface glass lens of a near-zero aberration;
This outer tube is a stainless steel;
This outer tube is a glass material;
This optical fiber head and non-spherical lens are to be individually fixed in the outer tube with UV glue;
In the length between the optical fiber head of outer tube and non-spherical lens, be provided with one and keep air pressure inside and outside identical air hole, and improve the fiduciary level of environmental factor.
The utility model mainly is to utilize an outer tube, one non-spherical lens and an optical fiber head constitute, and the internal diameter of outer tube is identical with the external diameter of optical fiber head and non-spherical lens, make optical fiber head and non-spherical lens can be respectively be inserted in the outer tube by the two ends of outer tube and fix, wherein optical fiber head is to the non-spherical lens that should fix and make real-time optics adjustment program, to adjust its fixed position, and the spacing that makes optical fiber head and non-spherical lens is adjusted into the effective focusing length (EFL) that is equal to or greater than this non-spherical lens, and make its greater than part be the best to be no more than 30 μ m, can be by above-mentioned structure, the out of focus distance, delta d of optical fiber end points is controlled in the certain limit of 30 μ m 〉=Δ d 〉=0, the operating distance of the best that sets each optical fiber collimator of finishing can be contained thereupon cover 0mm～140mm in a big way in all size, and keep to insert loss below 0.15dB, make it promote optical property and be applied in the technical matters that increases range of application on the assembly of long reach thereby solved.
The utility model is simple in structure, the operating distance of its optical fiber collimator system can be by effective control of the out of focus of optical fiber end points distance (Δ d), and make desired operating distance specification can contain lid from 0mm to 140mm in a big way, and keep inserting loss below 0.15dB, can effectively promote optical property, and can be applicable on the assembly of long reach, as multi-channel optical assemblies such as light circulator, light interleaver, optical exchangers; And owing to use the aspheric surface glass lens, what the error of the relative position of optical fiber head and aspherical lens caused is the change of best effort distance, but not the increase of the insertion loss that can not compensate, this is an advantage of the present utility model.
Description of drawings
Fig. 1 is the sectional view of known fiber optic collimating apparatus.
Fig. 2 is optical characteristics one synoptic diagram of a non-spherical lens.
Fig. 3 is the decomposition diagrammatic cross-section of the utility model one optical fiber collimator.
Fig. 4 is the combination diagrammatic cross-section of the utility model one optical fiber collimator.
Embodiment
As shown in Figure 2, be the optical characteristics of a non-spherical lens, in order to the know-why of explanation the utility model structure, this non-spherical lens 20 is an optimization, minimum aberration, effective focal length is the non-spherical lens of f; As Gaussian beam (Beam Waist=ω from optical fiber end point (Fiber Tip) outgoing
1), through length d
1(d
1Be the distance of optical fiber end point to non-spherical lens) and non-spherical lens 20 after focus on d
2, and 2d
2Be the best effort distance of optical fiber collimator system at this moment, waist wide (beam waist) is spot radius (spot radius) and becomes ω
2With single-mode fiber (single-mode fiber), can learn wherein ω again
2With ω
1, f, Δ d (Δ d=d
1-f) wait close each other computing formula.Again as can be known, when utilizing a non-spherical lens, can change the relative distance of optical fiber end points and focal length of lens f, i.e. out of focus distance, delta d (the Δ d=d of optical fiber end points in optical fiber collimator by above-mentioned optical characteristics
1-f),, can be divided into d to analyze through the various focusing situations behind the lens
1Δ d=0, d during=f
1Δ d＞0 during＞f, d
1Δ d＞＞0 and d during＞＞f
1Different situations such as Δ d during＜f＜0 grade illustrate its result respectively:
Example (1): work as d
1During=f, Δ d=0, this moment focus point from lens f place, directional light has maximum spot radius (spot radius) or spot size (spot size) and minimum scattering angle, best effort is apart from being 2f;
Example (2): work as d
1During＞f, Δ d＞0, promptly optical fiber end points left in figure moves apart, and focus point is gradually away from lens f place at this moment, and promptly the best effort distance is more and more big, and gradually small light spot size (spot size) and gradually big scattering angle are arranged this moment;
Example (3): work as d
1During＞＞f, Δ d＞＞0 is that optical fiber end points left in figure moves apart and exceeds more than a certain distance, this moment focus point less than lens f place, having very, small light spot size (spot size) reaches very big scattering angle;
Example (4): work as d
1During＜f, Δ d＜0, i.e. the optical fiber end points nearly non-spherical lens that moves right, this moment, the directional light out-focus was directly dispersed, and its virtual focusing point (is d in non-spherical lens 20 the place aheads
2＜0), and not there is the best effort distance.
And according to the above, the optical characteristics of substitution single-mode fiber (single-mode fiber), more and then learn: as the out of focus distance, delta d of optical fiber end points (Δ d=d
1-f) when 5～60 mu m ranges, its best effort of reaching distance can be from 0mm to 150mm, and this moment scattering angle all less than 0.0025 °.The insertion loss of collimator system comes from misfit (the unmatched spot-size) of the alignment error (misalignment) of two collimating apparatus outgoing Gaussian beams and spot size again; Therefore in above-mentioned example (1) in example (3), the pore size (Aperature) that can suppose lens greater than the spot size of the Gaussian beam of incident, (is 2d as long as the operating distance of two collimating apparatuss is adjusted to best operating distance very
2), collimating apparatus is because the insertion loss that spot size is misfitted can level off to zero.And the utility model be according to above-mentioned when being used in optical fiber collimator with a non-spherical lens optical characteristics and design, especially when the out of focus distance (Δ d) of optical fiber end points can effectively be controlled, promptly the best effort of this optical fiber collimator system of may command was apart from (2d
2).
Shown in Fig. 3,4, the improved optical fiber collimator of the utility model, mainly be to utilize an outer tube (Holder) 30, a non-spherical lens (Aspherical Lens) 40 and one optical fiber head 51 to constitute, wherein, the external diameter of this non-spherical lens 40 is identical with outer tube 30 internal diameters, makes non-spherical lens 40 be inserted in the outer tube 30 from first end 31 of outer tube 30 and fixes; And the external diameter of the optical fiber head 51 of optical fiber 50 is identical with the internal diameter of outer tube 30, can be inserted in the outer tube 30 from second end 32 of outer tube 30 and fix, again wherein, this optical fiber head 51 is to should non-spherical lens 40 and make real-time optics adjustment program and be fixed in the outer tube 30 again, and the spacing of the fixed position of optical fiber head 51 and non-spherical lens 40 is to be adjusted into effective focusing length (the Effective Focal Length that is equal to or greater than this non-spherical lens especially, EFL), and wherein greater than part be the best to be no more than 30 μ m, then by above-mentioned structure, because of out of focus distance, delta d (the Δ d=d of optical fiber end points
1-f, and d
1Be the spacing of optical fiber end point 52 to non-spherical lens 40) be controlled in the certain limit as 30 μ m 〉=Δ d 〉=0, make the best effort distance (Working Distance) that sets each optical fiber collimator of finishing can be with the size variation of each out of focus distance, delta d, and then contain lid in a big way as all size among 0mm～140mm (can detect the operating distance of each optical fiber collimator one by one) by optical instrument, and keep inserting loss below 0.15dB, promoting optical property, and can be applicable on the assembly of long reach and increase range of application.
This non-spherical lens (Aspherical Lens) 40 can be the aspheric surface glass lens (Molding Aspherical Glass Lens) of the model of a near-zero aberration again, i.e. leveled off to after the revisal of its aberration through aspheric surface high-order coefficient (High-Order Coefficient) zero (＜0.025 λ at λ=0.6328 μ m); And outer tube 30 can be stainless steel or glass material is made, wherein and with glass material is good, when the spacing of the fixed position of optical fiber head 51 and non-spherical lens 40 when adjusting control (even this spacing is controlled at the effective focusing length that is equal to or greater than this non-spherical lens, and order greater than part be the best to be no more than 30 μ m), can utilize exact instrument to cooperate and by the directly detection of the glass tube outside of outer tube 30; Optical fiber head 51 and non-spherical lens 40 can be fixed in the outer tube 30 with UV glue respectively again.Be provided with a suitably big or small air hole 33 again in outer tube 30 length between optical fiber head 51 and the non-spherical lens 40, to keep its air pressure inside, to improve the fiduciary level of environmental factor with outside identical.
Because the operating distance of the utility model optical fiber collimator system can be by effective control of the out of focus distance (Δ d) of optical fiber end points, and make desired operating distance specification can contain lid from 0mm to 140mm in a big way, and keep inserting loss below 0.15dB, so structural design of the present utility model, can effectively promote optical property, and can be applicable on the assembly of long reach, as light circulator (Optical Circulator), light interleaver (Optical Interleaver), optical exchanger multi-channel optical assemblies (Multi-port Optical Device) such as (Optical Switch).
And in order to be issued to best optical characteristics in different operating distances, comprise minimum scattering angle, minimum insertion loss, the deviation angle of minimum and minimum reflected light etc., in the technology of known use graded index eyeglass, need the relative position of real-time adjustment optical fiber head and graded index eyeglass usually; Yet the utility model uses the aspheric surface glass lens, because the error of the relative position of optical fiber head and aspherical lens, what cause is the change of best effort distance, but not the increase of the insertion loss that can not compensate, this is an advantage of the present utility model.
The above only is embodiment of the present utility model, and is non-for limiting practical range of the present utility model; Generally be familiar with the personage of this skill, it is according to feature category of the present utility model, and other equivalence of being done changes or modifies, and all should be encompassed in the utility model claim.
In sum, the utility model can reach desired effect by the above-mentioned structure that discloses really, and do not see the also unexposed use of publication before the utility model application, met the important document such as novelty, advance of utility model patent, so propose utility application in accordance with the law.
Claims (9)
1, a kind of improved optical fiber collimator is made of an outer tube, an eyeglass and an optical fiber head, it is characterized in that:
This eyeglass is a non-spherical lens, and its external diameter is identical with the internal diameter of outer tube, and is inserted in the outer tube internal fixation from first end of outer tube;
This outer tube is installed with a non-spherical lens and an optical fiber head in its pipe;
This optical fiber head, its external diameter is identical with the internal diameter of outer tube, second end from outer tube is inserted in the outer tube, and to should non-spherical lens and make real-time optics adjustment program and fixed, and the spacing of the fixed position of optical fiber head and non-spherical lens be to be adjusted into the effective focusing length that is equal to or greater than this non-spherical lens.
2, improved optical fiber collimator according to claim 1 is characterized in that: the fixed position of this optical fiber head and the spacing of non-spherical lens than the effective focusing length of this non-spherical lens greater than part be the best to be no more than 30 μ m.
3, improved optical fiber collimator according to claim 1 is characterized in that: the out of focus distance, delta d of this optical fiber end points is in the scope of 30 μ m 〉=Δ d 〉=0.
4, improved optical fiber collimator according to claim 1 is characterized in that: this optical fiber collimator best effort distance is in 0mm～140mm scope, and keeps inserting loss below 0.15dB.
5, improved optical fiber collimator according to claim 1 is characterized in that: this non-spherical lens is the model aspheric surface glass lens of a near-zero aberration.
6, improved optical fiber collimator according to claim 1 is characterized in that: this outer tube is a stainless steel.
7, improved optical fiber collimator according to claim 1 is characterized in that: this outer tube is a glass material.
8, improved optical fiber collimator according to claim 1 is characterized in that: this optical fiber head and non-spherical lens are to be individually fixed in the outer tube with UV glue.
9, improved optical fiber collimator according to claim 1 is characterized in that: be provided with one and keep air pressure inside and outside identical air hole in the length between the optical fiber head of outer tube and non-spherical lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252544 CN2569168Y (en) | 2002-09-06 | 2002-09-06 | Improved optical fibre collimator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02252544 CN2569168Y (en) | 2002-09-06 | 2002-09-06 | Improved optical fibre collimator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2569168Y true CN2569168Y (en) | 2003-08-27 |
Family
ID=33722001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02252544 Expired - Fee Related CN2569168Y (en) | 2002-09-06 | 2002-09-06 | Improved optical fibre collimator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2569168Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100495096C (en) * | 2004-05-26 | 2009-06-03 | Hoya株式会社 | Optical module and optical wavelength multiplexer/demultiplexer |
| CN105974525A (en) * | 2016-07-28 | 2016-09-28 | 福建福晶科技股份有限公司 | Optical fiber collimator using cone-shaped lens |
| CN107991773A (en) * | 2017-11-30 | 2018-05-04 | 上海伟钊光学科技股份有限公司 | The production method of optical fiber optical path pool |
-
2002
- 2002-09-06 CN CN 02252544 patent/CN2569168Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100495096C (en) * | 2004-05-26 | 2009-06-03 | Hoya株式会社 | Optical module and optical wavelength multiplexer/demultiplexer |
| CN105974525A (en) * | 2016-07-28 | 2016-09-28 | 福建福晶科技股份有限公司 | Optical fiber collimator using cone-shaped lens |
| CN107991773A (en) * | 2017-11-30 | 2018-05-04 | 上海伟钊光学科技股份有限公司 | The production method of optical fiber optical path pool |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030827 Termination date: 20091009 |